Developing Hubot scripts intended for use with the Slack adapter is a bit of a pain, because the default Shell adapter prints any complex responses as the thoroughly unhelpful [object Object]. If you wish to preview these responses locally, install and use the Shellish adapter instead to see a util.inspect() dump of any complex responses.

Install this package from npm:

$ npm install hubot-shellish

Append --adapter shellish to your command-line arguments:

$ ./node_modules/.bin/hubot --adapter shellish